Bike Forums > gear ratios...
 Register All Albums Elite Membership Forum Rules Calendar Search Today's Posts Mark Forums Read

 Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

 11-24-00, 02:29 AM #1 claude Senior Member Thread Starter     Join Date: Oct 2000 Location: Malta, Europe Bikes: Posts: 59 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Hi to all, sorry if this question might seem banal to you people, but I just realised (about time I did ??) that newer bikes have got much smaller chainrings than my 10 year old MTB... want to make sure before I buy some bits... Is the gear ratio measured as the difference between the number of teeth between the chain ring and cog ? Would a, for example 44-11 gear ratio feel exactly the same as a 48-15 ?? thanks for any feedback claude
 11-25-00, 03:08 AM #2 madsnake Member     Join Date: Nov 2000 Location: Christchurch. New Zealand Bikes: Posts: 33 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Chainrings The formula is: number of teeth on chainring/number of teeth on cog x wheel diameter = gear inches. The result is the distance travelled for one pedal revolution. Hence 44:11 = 104 gear inches. 48:15 = 83 gear inches. 52:13 would give you 104. A good cycle mechanics book should give give you a table of gear inch equivalents.
 11-27-00, 01:34 AM #3 claude Senior Member Thread Starter     Join Date: Oct 2000 Location: Malta, Europe Bikes: Posts: 59 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) so, if I understood correctly, my older bike with a 48:13 ratio would actually be slower than a newer bike with 44:11 ratio, although the difference in teeth is actually more in the older bike.... claude

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules

All times are GMT -6. The time now is 03:43 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.